Field tests show that relieving excess static pressure into non-calling zones has a negligible impact on temperature for the short durations required to maintain system balance

This model utilizes a positive dead-end lockup to prevent downstream pressure spikes when the appliance is not in operation

updated replacement for the discontinued 626461 model

Common Questions Is the immersion well included with this aquastat

Which actuators use the D-3244-615 diaphragm

Lennox 21Z09 Sensor Kit 326058-756 Field tests show that relievingThe Lennox 21Z09 Enthalpy Sensor Kit (also identified as 603364 35) is a critical diagnostic and control component for commercial HVAC rooftop units. Operating as a high precision dual sensing device, this enthalpy sensor replacement monitors both sensible temperature and relative humidity to determine the total heat content of the air. This data is essential for economizer air side control, allowing the system to utilize outdoor air for free cooling